// Copyright (c) 2010 SuccessFactors, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//     * Redistributions of source code must retain the above
//       copyright notice, this list of conditions and the following
//       disclaimer.
//
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials
//       provided with the distribution.
//
//     * Neither the name of the SuccessFactors, Inc. nor the names of
//       its contributors may be used to endorse or promote products
//       derived from this software without specific prior written
//       permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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package org.owasp.jxt.tag.core;

import org.owasp.jxt.Attribute;
import org.owasp.jxt.Encoder;
import org.owasp.jxt.JxtExpr;
import org.owasp.jxt.TranslateContext;
import org.owasp.jxt.ValidationContext;

/**
 * CoreOutNode
 *
 * @author Jeffrey Ichnowski
 * @version $Revision: 8 $
 */
public final class CoreOutNode extends AbstractCoreNode {

    private JxtExpr _value;
    private JxtExpr _default;
    private JxtExpr _escape;

    CoreOutNode() {
        super("out");
    }

    @Attribute(required=true)
    public void setValue(JxtExpr value) {
        _value = value;
    }

    @Attribute
    public void setDefault(JxtExpr arg) {
        _default = arg;
    }

    @Attribute(pattern="xml|none")
    public void setEscape(JxtExpr arg) {
        _escape = arg;
    }

    @Override
    protected void validateContent(ValidationContext ctx) {
        // TODO: make it capture content, and escape!
        if (getFirstChild() != null) {
            ctx.error(this, "validation.content-empty", "out");
        }
    }

    private Encoder escapeLiteral() {
        if (_escape == null) {
            return Encoder.XML;
        } else if (_escape.isLiteral()) {
            Encoder esc = Encoder.forName(_escape.getText().toUpperCase());
            assert esc != null : "Could not resolve escape type: "+
                _escape.getText()+" (this should have been caught during validation)";
            return esc;
        } else {
            return null;
        }
    }

    @Override
    public void translate(TranslateContext ctx) {
        Encoder escape = escapeLiteral();

        // TODO: consider ctx.getEscape();

        // value escape
        //   S     S     ctx.data(escape.apply(text))
        //   D     S     ctx.codeln(JxtUtils.escapeXXX(text))
        //   D     D     ctx.codeln(JxtUtils.escape(type, text))
        //   S     D     ctx.codeln(JxtUtils.escape(type, "..."))

        if (_value.isLiteral() && escape != null) {
            // both static

            // don't write a line number here, since this can be
            // combined with surrounding text.  A codeln for a comment
            // in-between would break up the text and writes.
            ctx.data(escape.apply(_value.getText()));
        } else {

            ctx.translateLocationComment(this);

            if (escape != null) {
                // value dynamic, escape static

                if (escape == Encoder.NONE) {
                    ctx.codeln("out.write("+_value+");");
                } else {
                    ctx.codeln("Encoder."+escape+".apply(out, "+_value+");");
                }

//                 ctx.codeln("out.write(JxtUtils.escape"+
//                            JxtUtils.capitalize(escape.toString())+
//                            "(" + _value + "));");

            } else {
                // Either:
                // - value static, escape dynamic
                // - both dynamic

                ctx.codeln("out.write(JxtUtils.escape("+_escape+", "+_value+"));");
            }
        }
    }

} // CoreOutNode
